leftover squares project

I had some charm squares left over and tried using them for a wall hanging , but not sure how well it's working. i don't think there's enough contrast in a lot of the blocks. my son re-arranged them (the top picture) and it looks better, but still not enough contrast. and of course its short one block! maybe if I take out some of the ones w/o enough contrast and let it be smaller it might work. I'm gonna keep playing with it and see what I can get. what do you think??
any suggesstions? I do have some border fabric that is blue with flowers from the same line, maybe make some pinwheels and use the blue for sashing...too many choices! not a bad thing really..